Wrench.



G. PATERSON.

WRENCH.

APPLIOATION FILED JUNE 15, 190s.

@@2359 Patented Nov. 3; 1908.

E34/Wenko@ l GEORGE PATERSON, OF FABRE, VERMONT.

WRENCH. i

Specification of Letters Patenti.

Patented Nov. 3, 1908.

Application filed June 15,-1908. SerialNofdBBSl.

To all whom .it may concern:

Be it known that I, (,nononlvrnnsolv. a citizen ofiithe` United States. residing 'at Barre, in Ythe county of TWashingtoifand State of Vermont, have invented certain new and useful Improvements in l-)ipe-lllrenches; an'd I do declare the following to be a full, clear.,l and exact description ofthe inil'ention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in pipe wrenches.= I

The object of the invention is to provide a pipe wrench, the jaws of which are operated by a proper manipulation of the handle to engage and disengage them from the ohjeets to be turned, and by means of which' the pressure applied to the handle in'one direction will serveto firmly grip both jaws with the object to be turned.

With this and other objects in view, the invention consists of certain novel features of construction, combination and arrangement ofpparts as will be described and particularly pointed ,out in the, appended claims.

In the accompanying drawing, Figure 1 is a side view of a wrench -showing t-he jaws in closed position; Fig. 2 is al similar view showing the jaws in open position; Fig. 3 is a front View with the parts as shown in Fig.

l; and Fig, 4 is a detail perspective View of the inner and outer jaw members, and the upper end of the handle'showing these parts disconnected.

Referring more particularly to the drawings, 1 denotes the handle, which is here shown in the form of a flat metal bar having a rearwardly curved bifurcated upper end, 2. In the bifurcated upper end of the handle,l is pivotally connected the lower end.

or shank, 3, of the outer jaw, 4, said jaw having a serrated gripping or engaging surface, 5, and beveled outer edges.

The inner jaw 6 is provided with a shank in the forni of spaced parallel plates, 7, the inner ends of which are pivotally connected to the handle, 1, below the bifurcated end 2 of-fthe same. The upperand lower ends of the parallel side plates 7 of the inner jaw are offset as shown at 8, so that said ends may be brought into close engagement with the handle below the end 2, and with the shank 53 of the outer jaw, as shown. In the plates 7, adjacent to their outer ends is arranged a transverse,.p1n, 9, which is engaged with a curved slot.- 10, formed in the. shank 3 of the outer jaw,` as shown.

The shank, 3, 'of the outer jaw is curved' rearwardly to engage the rearwardly'curved bifurca ted upper end of the handle whereby said outer aw is operated in the proper manner to cause the same to be engaged with and disengaged from the object to be turned when the handle is swung in one direction or the other. The shank, 3, is reduced or of less width than the jaw, 4, thus providing shoulders l2 on the opposite sides of the jaw, said shoulders being formed on a. curve or arc to correspond with the curve or rounded rear upper corner of the inner jaw.

Secured to the lower side of the inner jaw, adjacent to the forward edge of the shank plates. 7, is a'springv` 13, which may be of any suitable' construction, but which is here shown and is preferably in the form of a bail, the ends of which are secured to the jaw, as shown, while the lower looped portion ofthe same is adapted to bear against the forward side of the bifurcated upper end of the handle, the tension of the spring being exerted to aid in forcing said bifurcated upper end of the handle and the shank of the outer jaw rearwardly between the side plates 7 of the shank of the inner jaw, thus causing the outer jaw to move inwardly toward the inner aw.

In using the wrench, the lower end of the handle is swung baekwardly or lrearwardly, which will cause the bifurcated upper end of the same and the shank 3 of the outer jaw to move forwardly, thereby opening the jaws to the proper extent for engaging the object to be turned. After `the jaws have thus been opened and engaged with the object, the handle is swung or forced forwardly in the opposite direction, /thus causing both the outer and inner jaws to firmly grip the object. By thus arranging the jaws and connecting the saine to the handle, the more pressure applied to the latter, the tighter the jaws will be gripped on the object to be turned.

From the foregoing description, taken in connection with the accompanying drawing, the construction and operation of the invention will be readily understood without requiring a more extended explanation'.

Various changes in the form, proportion and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of the invention as dened in the appended claims;

Having thus described niy invention, what I claim as new and desire to secure by Letl ters-Patent, is:

l. In a pipe'wrench, -a hand-le having a rearwardly curved bifurcated upper end, an outer jaw having a reduced rearwardly curved shank pivotally connected in the biurcated upper end of said handle, an inner jaw having a shank ornied of parallel plates adapted to engage the shank of said outer jaw and the upper end of the handle, nieans to, pivotally connect the lower end of said plates with the handle, a pin and slot connection between the slianks of said inner and outer jaws, and a jaw operating spring secured to the inner jaw and adapted to bear against the curved upper'end of the handle, substantially as described.

In a pipe wrench a handle having Aa rearwardly curved bifurcated upper end, an inner jaw having a shank formed of parallel plates offsetV intermediate their ends to pro vide a space to receive the bifurcated upper end of said handle, said plates having aA pivotal connection at their lower end with the handle below said bifurcated upper end, an outer jaw having a reduced 'rearwardly curved shank arranged between the upper ends of said inner jaw shank plates, said outer jaw having a pivoted sliding engageinent with said plates, and 'a pivotal connection with the bifurcated upper end of said.

handle, and a spring secured at onevend to said outer Jaw shank and having its opposite end bearing against the upper end oi saidliandle wherebyI theoperation of said jaws is facilitated.

In testimony whereof I have hereunto set niy hand in presence of two subscribing 

